Accoustic wave amplifier/attenuator apparatus, pipe system having the same and manufacturing method of the pipe system

An acoustic wave amplifier/attenuator apparatus that is arranged in a pipe arrangement, in which an acoustic wave is propagated, and that uses thermoacoustic effect to amplify or attenuate the acoustic wave, the acoustic wave amplifier/attenuator apparatus comprising:

• a cold heat exchanger;
• a hot heat exchanger;
• and
• a stack that is held between the cold heat exchanger and the hot heat exchanger.

A manufacturing method of a pipe system, the method comprising:

• installing a sound source device to a pipe arrangement;
• installing at least one energy converter to the pipe arrangement, wherein each energy converter converts energy of an acoustic wave, which is propagated in the pipe arrangement, into another form of energy;
• and
• installing at least one acoustic wave amplifier/attenuator apparatus in the pipe arrangement at a corresponding location between the sound source device and a corresponding one of the at least one energy converter, wherein each acoustic wave amplifier/attenuator apparatus uses thermoacoustic effect to amplify or attenuate the acoustic wave and includes:
• a cold heat exchanger;
• a hot heat exchanger;
• and
• a stack that is held between the cold heat exchanger and the hot heat exchanger.